Create FastTrack
by stacode
Create FastTrack speeds up Create's track network updates on Forge 1.20.1 servers, where placing or breaking a track can cause lag spikes.
What it does
Each time a track is added or removed, Create's TrackGraph runs a connected-component flood fill across the whole rail network. On large networks that search can stall a server for a noticeable moment. Create FastTrack replaces the slow part of that search: the breadth-first queue, which Create 6.0.8 implemented with an ArrayList that shifts its whole backing array on every removal from the head. The replacement keeps the flood fill linear in the number of nodes, so track changes on long train lines no longer walk billions of array elements.
The mod is a small standalone fix written for servers that struggle with railway edits. It needs Create to run, and it is published for Forge 1.20.1 only, at version 1.0.0, released 2026-08-08. Server owners install it on the server, where the flood fill runs. On game start the mod runs a self-test of the flood-fill routine and logs OK when the optimised method works correctly at runtime. The code is open source under the MIT License.
Key features
Faster track flood fill
The connected-component search after a track change uses a queue that avoids shifting the array on every pop, so the work grows linearly with the network size.
Reduced lag on large rail networks
Building, rerouting or removing track in very large networks no longer produces the stutter that Create's original queue causes.
Startup self-test
On game start the mod checks the optimised flood-fill method and logs a result, so server owners can confirm it is active.
Targeted scope
Only the track graph search is changed; other Create systems keep their original code.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 1
Use cases
Busy railway servers
Multiplayer servers with large shared train networks, where many players place and break track, are the main case the mod targets.
Long train lines
Single-world builds with very long lines benefit when rerouting one section triggers a full network search.
Who it’s for: Server owners running Create on Forge 1.20.1 whose players build large rail networks and see tick lag when placing or breaking track.
Questions
Does Create FastTrack require Create?
Does Create FastTrack have to be installed on the client?
Which game version is supported?
How can a server owner confirm the fix is active?
In the catalog
Create FastTrack is one of 3,545 Optimization mods on ModsFinder, and one of 1,441 Optimization mods for Forge. 34,764 mods support Minecraft 1.20.1.
More from stacode
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What the author says
A tiny standalone Forge 1.20.1 mod that fixes a performance hot-spot in Create's railway code by applying the track-network flood-fill optimisation to the published Create mod — no forked Create needed. Whenever a track is placed or broken, Create's TrackGraph#findDisconnectedGraphs runs a connected-component flood…
Official listing
- Modrinth page
- modrinth.com/mod/create-fasttrack
- Owner
- stacode
- Published
- 2026-08-08
- Updated on Modrinth
- 2026-08-08
- Facts verified
- 2026-10-15